I am really considering that. Already got CO to confirm that they would match my NW/DL PE status.. just poor routing by CO to SEA (my three most frequent routes are HNL-DCA, HNL-SEA and DCA-SEA), as no more AS on CO soon.

I will check CO routes (both revenue & award) available when it's in *A and see if really makes sense then.

What will make a big difference is if DL will still do what NW did and offer P464 Hawaii-Resident-Only Any-Fare to 1st Class Upgrade certificates (unlikely that DL will do anything like that for anyone but Atlanta residents..). That would keep me with DL. (Or to switch to CO if they did that, to the best of my knowledge they don't do that. And also no system wide free upgrade certs for int'l flights either with CO is a negative.)